https://scholars.lib.ntu.edu.tw/handle/123456789/547647
標題: | Environmental impact of high concentration nitrate migration in soil system using hydrus simulation | 作者: | Zhang, Y. Lee, D. Ding, J. Lu, J. DUU-JONG LEE |
關鍵字: | Environmental impact; Nitrate contamination time; Nitrate migration; Numerical model; Soil and groundwater | 公開日期: | 2020 | 卷: | 17 | 期: | 9 | 來源出版物: | International Journal of Environmental Research and Public Health | 摘要: | Nitrate is a promising heat transfer fluid in solar thermal power and nuclear power systems, but its leakage can cause serious environmental problems. The present paper investigates the deep and prolonged migration of high concentrations of nitrate into the soil system, and the associated diffusion range is studied to estimate and reduce the environmental pollution caused by nitrate leaks. The vertical nitrate contaminated range is mainly impacted by annual precipitation, soil properties and groundwater depth, while the horizontal contaminated range is mainly affected by the initial leakage area. During the process, the vertical contaminated range first continuously enlarges, and then decreases after a long time. The nitrate contaminant can exist and affect the environment for as long as 115–625 years, and the nitrate contamination time can be even longer in dry regions. Since nitrate diffuses more quickly in unsaturated regions rather than in saturated regions, the migration region and contaminated range both decrease as the groundwater depth is increased. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.url?eid=2-s2.0-85084036054&partnerID=40&md5=3277dc0820e2d67a9828b78014d21b46 https://scholars.lib.ntu.edu.tw/handle/123456789/547647 |
ISSN: | Zhang, Y.;Lee, D.;Ding, J.;Lu, J. | DOI: | 10.3390/ijerph17093147 | SDG/關鍵字: | ground water; nitrate; rain; ground water; nitric acid derivative; concentration (composition); diffusion; environmental impact; groundwater; nitrate; precipitation (chemistry); soil pollution; soil property; Article; density; diffusion; environmental impact; mathematical model; pollution transport; porosity; precipitation; sand; soil change; soil pollution; soil property; environmental monitoring; soil; water pollutant; Environmental Monitoring; Groundwater; Nitrates; Soil; Water Pollutants, Chemical |
顯示於: | 化學工程學系 |
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